We are getting ready to put an ACT MB7-HDSS in an evo that rarely see's hard driving, is still on the stock clutch at 37k miles and almost 300whp on a DynoDynamics dyno. Only spirited driving, but mainly highway miles. Ive heard many different opinions on resurfacing the stock flywheel. Some say if there are no heat spots, not pitted, cracked or visibly damaged that I am probably fine with not resurfacing. Others say yes always resurface when getting a new clutch in. The problem is, this car will be doing on a weekend, and most machine shops are not open on the weekend and this car will have to be back up and running that same weekend because it is a daily driver to and from work. So if no resurfacing is possible, the thought of a Fidanza flywheel comes to mind. Opinions on all of this? New flywheel bad? Some say yes, some say no.......

 

Search is your friend
https://www.evolutionm.net/forums/sh...light=flywheel
https://www.evolutionm.net/forums/sh...light=flywheel

 

Thanks, and i do plenty of research before I post. Thanks.

PS ive already read both of those threads before your so called "searched for me"

 

I would do nothing about it as long as it looks good. When I installed my clutch I went with a flywheel along with it because I wanted a lightweight. I would say if money was not a problem get a new one for sure, if money is a problem keep the stock one.

 

People have had good experiences with Fidanza, which is aluminum.

I'm probably leaning towards a chromo flywheel such as Prostreet or the RRE. I believe ACT is coming out with one later this year (per a post from ACTman in another thread), but not that soon.

In my all motor Integra GSR, I had a bad experience reusing the stock machined flywheel with an Exedy clutch. Probably install (done by dealer) and/or bad machining of the flywheel, but still. Clutch didn't last long and had chattering issues early on.

I replaced with an ACT clutch and Spoon chromo flywheel and it was still gripping and driving awesome when I sold the car...

Good luck.

FB

 

I did not like the way the thin stock f/w dissapated heat. Since there have been many users complaining about cltuch performance I decided to spend the extra cash and switch to the fidanza with its replacable friction surface and the more heat conductive aluminum body. The stock setup was broken in (abused ) by the dealer's sales staff so I was provided the option of going with a prorated set of stock parts or providing my own set up al at no labor for the install. This was not as generous as it sounds as the trans was already out for the syncro TSB.

Resurfacing a f/w is much like resurfacing a brake disk. You gain an even surface that will mate better with the new friction components but you also risk warpage from stresses in the metal that might be relieved as some of the surface is removed. I believe the latter possility presents miniamal risk if only a light resuracing is done.. perhaps in the order of .01 in.

 

When I plan on getting my new clutch I also plan on getting a new lightweight flywheel. I'd rather be safe than sorry, might aswell replace it rather than pay more money to have it replaced at a later time again.

 

well i hear people say that a lightweight flywheel messes with the balance of the setup, since there is less mass, and that it may lead to problems in the long run.

 

Since I do many Evo clutches I have a freshly machined stock flywheel ready to go for the next job. I basically do a core swap with the one that comes out. Most Evo flywheels will show heat spots, specially visible thru the rear of the flywheel. This is no big deal and I've never had any issues with any flywheel. Aluminum does dissipate heat much faster but it also warps much easier than steel would. I think that nothing will beat a stock flywheel for durability and heat absorbtion. Think about it, you use bigger rotors with more mass to better deal with heat, why would you use a lighter and less capable unit. Grant it a heavier flywheel would handle more heat than the stock , but I think the stock is the best way to go as a compromise for performance/durability.

 

Yeah....Thats why im leaning on more the edge of sticking with the stock one. Just hope I dont have to get it resurfaced since that is a very very slim option with the downtime and timeslow i will be allowed.

 

Dirk of ACT seems to think (if I remember correctly) that a lot of the increased "noise" people experience with aftermarket clutches is do to installing a lighter flywheel. The theory is that the lighter aluminum wheel does not have enough mass to help dampen the harmonics associated with the tranny. I have a Fidanza flywheel available to me when I do my clutch. However, other than throwout bearing noise while in neutral, my drive train is perfectly quiet. I'm not sure I want to give that up. Also, there is rumor that the OE Exedy pressure plate has "dampening" designed into the pressure plate that after market pressure plates do not. I want to go with an ACT/light weight flywheel, but "...I want to eat my cake too."

 

yeah the only real noise I have also is throwout bearing while in neutral, and a few occasional notchy shifts. Im hoping the new clutch will help straighten this out.

 

I plan on keeping the stock flywheel. I can't justify the 400$+ for a 4lbs reduction. (Just my .02)

As for the resurface, I'll decide that when I see it.

 

I have to reiterate there is NO noise what so ever associated with the Fidanza with ACT street disc setup.
I am using it currently and have had no problems.

The below thread has a statement from "Works"
https://www.evolutionm.net/forums/sh...d.php?t=125570

I know he is promoting his products but I would believe they speak from experience.

 

Ditto. A resurface is only $80 bucks anyways.